Update Just in case you are still reading
I Tried the Spec 53/18 spec for my last ulduar raid and It went bad. My threat wasn't as high as it was with my old spec, They didn't pull from me , but i wasn't getting any higher than 4500tps, Normally I get around 5,000tps to 6,000tps and with wings I get 7,000tps to 8,000tps. I am sorry to who all believe that the 53/18 spec better, but I do not see it. I would rather do more damage and threat all the time then bank on gettting crits with my spells and attacks. Take it or Leave it. For Aceer, I would recommend my spec for him. Just look up Steves in the Armory.
Also with 3.2 coming out, putting points in Seals of the Pure would help out alot
3.2 Update -
Seal of Vengeance and Seal of Corruption: These seals have been redesigned to deal substantially more damage. Now, once a paladin has 5 copies of the debuff from these seals on his or her target, on each swing the paladin will deal 33% weapon damage as Holy, with critical strikes dealing double damage.